Our people

Designing and operating New Zealand’s electricity system takes great people. Our team is made up of around 170 staff who are led by our Board, Chief Executive and senior leadership team.

Our governance and management

The Electricity Authority is governed by a Board who are appointed by the Governor-General on the recommendations of the Minister for Energy, following a public call for nominations.

Our Chief Executive and senior leadership team lead a team of about 170 people – and we're growing. Each member of our team plays a vital role in championing our values, vision and success.

Our Board

Our Board members bring a wealth of governance and business development expertise, as well as extensive experience in energy, utilities, infrastructure, environment, engineering, law and finance.

Erik Westergaard

Deputy and Acting Chair

Erik is an electricity market and energy sector regulatory specialist who has been closely involved in the establishment and ongoing development of electricity market arrangements in several countries. His work has included reviewing market arrangements to ensure that the electricity market delivered the expected benefits to consumers.

Erik was appointed by the Minister of Energy and Resources to act as Specialist Technical Advisor on the investigation into the 9 August 2021 power outages and was a member of the Security and Reliability Council for six years.

Erik has held a number of senior positions within industry participants and large international consulting firms. He is currently an independent consultant.

Erik was appointed to our Board on 16 January 2023 for a five-year term and appointed as Deputy Chair on 18 December 2025.

Tony Baldwin

Tony is a consultant providing advisory and project management services to private and public sector organisations on commercial transactions, strategy and regulatory policy. He has a deep and long knowledge of the electricity industry having led the officials’ team in restructuring the electricity industry to form the wholesale market in the 1990s, and subsequently contributing to market design processes in various capacities, recently as chair of the Electricity Authority’s Market Development Advisory Group (2018-24).

Tony has also project-managed a range of major M&A and capital markets transactions in the electricity and gas industries.

His body of regulatory and restructuring experience includes assisting in various strategic reviews, chairing the telco industry’s ‘unbundling’ of Telecom’s local loop network, and earlier leading the project team for the Government’s initiative to deregulate and corporatise nine statutory producer boards. Tony was a member of the Policy Advisory Group in the Department of the Prime Minister and Cabinet (1991-98), and a lawyer at Chapman Tripp in Wellington practicing in corporate and securities law. Tony’s details are at www.tonybaldwin.co.nz

Tony was appointed to our Board in December 2025 for a four-year term.

Ben Bolot

Ben has over 25 years’ market, operational and commercial experience across all parts of the energy value chain in Australia, the United States, Chile, Southeast Asia and the United Kingdom.

During that time, he has held a range of executive and governance roles, leading risk, business development and project development teams in the energy and infrastructure sectors.

Most recently this has included positions as the Director of BID Energy Partners, the Executive General Manager of Business Development at ATCO Australia and the Head of Mergers and Acquisitions, GFG Alliance.

Ben holds Bachelor of Laws and Bachelor of Commerce degrees from the University of Auckland and was previously admitted as a Barrister & Solicitor of the High Court of New Zealand as well as being a Chartered Accountant.

Ben was appointed to our Board in December 2025 for a four-year term.

Murray Parrish

Murray has a background in the forestry, packaging and environmental sectors.

He was a Regulatory Manager at Oji Fibre Solutions from 2010 until 2022. Prior to this, he worked for Carter Holt Harvey Forests as an Environment Manager and Carter Holt Harvey Corporate as a Corporate Environment Manager.

Murray has also been involved in a number of industry associations, such as the New Zealand Institute of Forestry, New Zealand Forest Certification Association, Packaging New Zealand and the Waste Management Industry Forum.

He was also a member of the government’s Fast Track Projects Advisory Group and Climate Change Forestry Reference Group.

Murray was appointed to our Board in December 2025 for a three-year term.

Paula Rose QSO

Paula is a Canterbury based director with a background in regulatory organisations in governance, management, policy and practitioner roles. She has over a decade of governance experience in Crown and non-profit organisations.

Paula’s current roles include Deputy Chief Commissioner Te Kāhui Tātari Ture Criminal Cases Review Commission and Commissioner with the Transport Accident Investigation Commission. She is a long-term volunteer with Hato Hone St John, is a Board Member on their Priory Board, and was made a Commander of the Order of St John in 2025. She holds a Queen's Service Order (QSO).

Paula was appointed to our Board on 16 January 2023 for a five year term.

Our Board has established an Audit and Finance Committee, Compliance Committee, Market Operations Committee, and TPM Committee.

View our Board's committees

We have two main advisory and technical groups who provide specialist independent advice and recommendations on the electricity industry to our Board.

View our advisory and technical groups

Our senior leadership team

Members of our senior leadership team are experts in policy, economics, law, strategy, finance and communications.

Sarah Gillies

Chief Executive

Sarah Gillies is the Chief Executive of the Electricity Authority.

She was appointed to the role in December 2022 and was previously the Authority’s General Manager Legal, Monitoring and Compliance. Sarah is a lawyer by background. She has spent most of her career in-house in corporates in both legal and non-legal roles and has also worked in large law firms.

She has an interest in technology businesses and has held governance roles, including on the board of a technology start up.

Hayden Glass

General Manager, Wholesale and Supply

Hayden leads our Wholesale and Supply team. He is an experienced leader and strategic advisor with a background in policy, regulation and technology in the public, private and not-for-profit sectors. Hayden is skilled in problem analysis, policy design, network economics and stakeholder engagement.

He has held senior roles at the Department of the Prime Minister and Cabinet, the Sapere Research Group, Figure.NZ and Vodafone New Zealand.

Mark Herring

General Manager, Corporate and Market Services

Mark leads our Corporate and Market Services. This team is responsible for our service providers who operate the electricity market efficiently and facilitate market development, and for internal functions including procurement, planning and reporting, finance, IT, risk and assurance.

Prior to joining the Electricity Authority, Mark was Group Manager for Markets and Business at Transpower New Zealand, where he led market policy, security of supply, regulation, reporting and change delivery.

Mark has also worked in a variety of leadership roles for the UK’s National Grid across functions including strategy, innovation, and code change. He brings strategic experience, stakeholder management skills and an extensive industry background to the role.

Airihi Mahuika

General Manager, Legal, Monitoring and Compliance

Airihi leads our Legal, Monitoring and Compliance teams.

Alongside other diverse legal roles, Airihi has extensive experience in infrastructure and economic regulation, having worked for both regulators and regulated companies across the electricity, transport and telecommunications sectors. She has previously held senior leadership roles in both the public service and commercial organisations.

Born in Tairāwhiti, Airihi is from Ngāti Porou.

Andrew Millar

General Manager, Retail and Consumer

Andrew leads our Retail and Consumer group, which is responsible for empowering and protecting consumers so that they can benefit for a secure, competitive, and affordability electricity market.

Andrew has extensive experience in public policy with a particular interest in using new and innovative models of policy development to help resolve difficult policy problems.

Prior to joining the Electricity Authority, Andrew was a Managing Principal at MartinJenkins. He has also worked for over 10 years in a number of government agencies as both a policy adviser and a policy manager. This included roles with the Ministry of Business, Innovation and Employment, Ministry for the Environment, and the former Department of Building and Housing.

Andrew has specialised skills in climate, energy and natural resources policy. He has worked on domestic and international climate change issues, on upstream and downstream energy policy development, and on marine policy.

Zoe Priestley

General Manager, Communications, Engagement and Data

Zoe leads our Communications, Engagement and Data team.

With extensive experience in communications, strategy, stakeholder and government relations, Zoe has led communications and media teams at Oranga Tamariki and WorkSafe New Zealand, and senior roles at the Ministry of Education, Health and Standards New Zealand.

Educated in law, arts and journalism, Zoe has also provided communications management and advice in the not-for-profit, industry training and industry dispute resolution sectors, including at Utilities Disputes.

Tim Sparks

General Manager, Networks and System Change

Tim leads our Networks and System Change group. The three policy teams in this group make sure the rules are fit for purpose when it comes to:

  • connecting to networks and use of network data
  • maintaining the security and resilience of the system through the transition with increasing amounts of distributed resources and intermittent generation
  • improving price signals for the distribution and transmission segments of the electricity supply chain.

This work aims to reduce the costs of the system over the long term for consumers, including through promoting efficient investment in and operation of energy technology and demand-side flexibility.

Previously, Tim worked in telecommunications, at Chorus and Optus, in roles with a focus on economic regulation.

Work for us

Help power Aotearoa! Electricity is essential to our lives and our economy. Join us as we support New Zealand's transition to a renewable future.
View careers